Context Evidence is lacking that a dietary pattern high in vegetables, fruit, and fiber and low in total fat can influence breast cancer recurrence or survival.

背景高蔬菜、水果、高纤维、低脂肪饮食对乳腺癌治疗的复发及生存率的影响不明确、缺少实验数据。

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Because of lacking necessary examining condition in RTK measurement, some error operation or improper technological treatment would bring badly serious influence on measurement achievement.

但是，RTK测量缺少必要的检核条件，作业时如果操作失误或某些技术问题处理不当，都会给测量成果带来严重影响。

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Model parameters influence the performance of SVM evidently, but structuring method for parameters selecting is lacking and parameters are generally determined by crossing test.

支持向量机的参数选择对模型的性能影响很大，目前支持向量机的参数选择尚缺乏公认有效的结构化方法，参数选取依靠交叉验证得到。

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Yet the experience of Britain's few existing mayors suggests there are ways of grabbing influence even when formal powers are lacking.

ECONOMIST: Reshaping local government